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目的评价背向散射积分(IBS)可否体外预测胆石的化学性质。方法以红外光谱定量分析结石的化学性质,将结石分为纯胆固醇性和纯胆色素性两组(以胆固醇≥70%为胆固醇性结石;胆固醇≤30%为胆色素性结石),每组30例共60例,对结石及其声影进行体外IBS测定。结果胆固醇组和胆色素组结石的图像峰-峰值(PII)及图像强度标准差(SDI)之间无显著性差别,两组间的图像平均强度(AII)有显著性差别(P<0.05),胆色素类结石的AII大于胆固醇类结石的AII;胆固醇组和胆色素组声影的IBS值比较只有AII有显著性差别(P<0.001),胆色素类结石声影的AII小于胆固醇类结石的AII;两组间结石-声影AII差值之间有显著性差别(P<0.001),胆色素组大于胆固醇组。结论背向散射积分能体外区分纯胆固醇性和纯胆色素性结石。
Objective To evaluate whether backscatter integration (IBS) can predict the chemical properties of gallstone in vitro. Methods The chemical properties of stones were quantitatively analyzed by infrared spectroscopy. The stones were divided into two groups: pure cholesterol and pure bile pigment (cholesterol 70% or more, cholesterol less than 30%), and 30 A total of 60 cases, the stone and its sound in vitro IBS determination. Results There was no significant difference in the peak-to-peak (PII) and standard deviation (SDI) between the cholesterol group and the biliary group. There was a significant difference in mean image intensity (AII) between the two groups (P <0.05) , AII of biliary pigment stones was higher than AII of cholesterol stones; IBS value of sound shadow of cholesterol group and biliary pigment group was only significant difference (P <0.001), AII of biliary pigment stones was smaller than that of cholesterol stones AII. There was a significant difference (P <0.001) between the two groups in the stone-sounding AII difference, and the biliary pigment group was larger than the cholesterol group. Conclusion Backscatter integration can differentiate pure cholesterol from pure gallstone pigment in vitro.